The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 11, 2001
Filed:
Jun. 29, 1999
Applicant:
Inventor:
Hirokazu Yoshizawa, Chiba, JP;
Assignee:
Seiko Instruments Inc., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M 1/12 ;
U.S. Cl.
CPC ...
H03M 1/12 ;
Abstract
In a resistor ladder circuit for supplying reference voltages to sub-A/D converter circuits constituting a pipeline type A/D converter, the circuit is configured in such a way that main resistors are connected in series with auxiliary resistors in order to produce a plurality of reference voltages so that the reference voltages which are supplied to an MDAC in the first stage differ from those which are supplied to the MDACs in and after the second stage.